Möhnesee is a large reservoir located in the state of North Rhine-Westphalia, Germany. It was created in the early 20th century for flood control, water supply, and hydroelectric power generation. The lake covers an area of approximately 10.5 square kilometers and is surrounded by scenic landscapes, making it a popular destination for outdoor activities. The Möhnesee Dam, which holds back the water, is an impressive structure that stands about 40 meters high. The area around the lake offers various recreational opportunities, including hiking, cycling, and water sports, attracting both locals and tourists throughout the year.